Improvement in drills for wells



vUnurrnn Staates Bari-@wr Oraties.

JOHN GBIEVES, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN DRILLS FOR WELLS.

Specification forming part of Letters Patent No. 52,1164, dated January23, 1866.

To all whom t may concern:

Beit known that I, JOHN Gnrnvns, of the city ot' Brooklyn, in the countyof Kings and State of New York, have invented a new and usefulImprovement in Drills for Boring Artesian Vells and for other Boring orDrilling Operations in Stone and Similar Substances;

and I do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming a part of this specification, iu which- Figure l is aside elevation of a drill constructed according to my invention. Fig. 2is an inverted plan view of Fig. l. Fig. 3 is a similar view to Fig. l,with sludge-pump or valve-box and casing attached in .partial section.Fig. I is a longitudinal side view of the trimming-cutter detached. Fig.5 is a horizontal section through line .fr :r of Fig. l.

Similar letters of reference indica-tecorresponding parts in the severalfigures rIhis invention consists in a novel construction of a drill,whereby a very great amount of cutting-surface is exposed to act againstthe rock, and it is so shaped as to be easily sharpened or dressed uponthe anvil. The peculiar construction of this drill is also well adaptedto its connection with a sand or sludge pump, as hereinafter fully setforth.

To enable others skilled in the art to construct my invention and applyit to use, I will describe it, having reference to the drawings.

The main body ofthe drill is constructed of two pieces of bar or platesteel, A and B, cut to the proper length and having the two sidesinclined toward each other in an upward direction. These two pieces ofsteel are then heated and upset on the side edges, making a heavier orthicker edge, to allow for the subsequent redressing to which the drillmay be subject. After the edges are upset the said pieces A B are benttransversely into the form of arcs, as shown in Figs. 2 and 5, and thetwo are welded together along the longitudinal centers of their convexedsides after interposing a small strip of ne, soft iron, a, Fig. 5, whichis put in in order to form a more perfect union of the two pieces ofsteel. The lower edge of the iron a is faced with steel a', so as toform a cutting-edge, as shown in Fie. 2, on each side ofthe slot C,which 1s out across the two pieces A and B for the reception of thetrimmiugbit D, which is secured therein by the key E, Fig. 2. Thetrimming-bit D is made in the form, on its cutting-edge, of an ordinaryletter-I drill, and is provided on one or each of its upper s ides withbrace-pieces cl d, which slide up along each, outside of pieces A andB.- The lower edges of the pieces A and B are beveled toward theoutsideor toward the circumference of the circle, within the limits ofwhich the cutters fall. The two cutting-edges of A and B may be dressedup or sharpened, after removing the bit D, by simply hammering them uponthe horn of the anvil. This mode secures important advantages, wherebythe steel is never wasted, as it necessarily would be if the edges weretiled 0r ground to a sufficient acuteness; and in this construction of adrill there need be no material wasted except such as is incident to thewear from contact with the rock.

The form ot' a drill is also well adapted for the reception of asludge-pump or valve-box, as shown in Fig. 3. rIhe upper portion of theedges of the pieces A and B is cut to a smaller diameter, leaving ashoulder, c, onto Which rests the ange e', Fig. 3, of a casing, F, whichis driven down over the inclined sides of the pieces A and B, forming aconical casing all around for the passage ofthe detritus.

The portion Gr, which is cut down to a less diameter, has a malescrew-thread cut upon it corresponding to a female thread cut on theinterior ot' a valve-box, H. In this form of the' drill, however, thesolid central stock or rod of the drill has a tube, I, Fig. 3,substituted for it.

The valve-box H, which is screwed to the parts G, is forged ot'wrought-iron, and provided with valve-seat li and cage h2, to receivethe ball-valve h, and also on its upper inner edge it is provided with afemale screw-thread s, corresponding to a male screw on the wrought-ironpipe I, intended to t thereon. rIhe valve-box screwing down upon theiange o secures the casing F to the drill.

When the pump is connected with the drill in the manner described thedetritus or sludge is driven upward at each stroke of the drill and isreceived above the valve in the same manner as the ordinary sludge-pump.

Instead of forming the curved parts A B of the drill by Welding twopieces together they may be formed of one piece of twice the thicknessby slitting` it edgewise'fand bending the divided parts over the anvil;but this would he a more expensive Way of forging.

What I claim as new, and desire to secure by Letters Patent, is*

l. The drill eonstrueted'of the two curved pieces A B and trimming-bitD, combined substantially as herein described.

l 2. The easing F, in combination with the the portions A B of thedrill, substantially as mi d for the purpose herein set forth.

3. rlhe valve-box H, Constructed and applied to secure the drill to thetubular rod and to secure the easing F, substantially as hereindescribed.

JOHN GRIEVES.

Vitnesses:

HENRY T. BROWN, LAWRENCE HOLMES, Jr.

